feat: IndexedDB 모듈 생성 및 Factory 클래스 구현

client/src/core/repository/repository.indexedDB.ts

@@ -0,0 +1,20 @@
+import { PlainTodo, InputTodo } from '@todo/todo.type';
+import { ITodoListDataBase } from '@repository/repository.interface';
+import { IDBPDatabase, openDB } from 'idb';
+
+const DB_NAME = 'OaO';
+const TABLE_NAME = 'todos';
+
+export class IndexedDBFactory {
+  async createDB(): Promise<IndexedDB> {
+    const db: IDBPDatabase = await openDB(DB_NAME, 1, {
+      upgrade(db: IDBPDatabase) {
+        if (!db.objectStoreNames.contains(TABLE_NAME)) db.createObjectStore(TABLE_NAME);
+      },
+    });
+
+    return new IndexedDB(db);
+  }
+}
+
+export class IndexedDB implements ITodoListDataBase {